Microsoft has warned customers to mitigate a high-severity vulnerability in Exchange Server hybrid deployments that could ...

"In an Exchange hybrid deployment, an attacker who first gains administrative access to an on-premises Exchange server could ...

The security problem affects organizations with a hybrid Exchange environment, running applications in both on-premises ...

Microsoft Exchange customers have been urged to apply fixes set out in a hybrid deployment security update published in April ...

CISA has issued an emergency directive ordering all Federal Civilian Executive Branch (FCEB) agencies to mitigate a critical ...

If an attacker gets admin control over the on-premises Exchange server, they can forge authentication tokens or make API ...

A vulnerability in Exchange hybrid deployments could allow attackers to escalate privileges and gain administrative access to ...

CISA has issued an emergency directive to address a security risk that could affect hybrid Microsoft Exchange users and ...

Administrators with hybrid Exchange Server environments are urged by Microsoft and the US Cybersecurity and Infrastructure ...

CISA and Microsoft have issued advisories for CVE-2025-53786, a high-severity flaw allowing privilege escalation in cloud environments.

Parts of the federal enterprise are likely susceptible to the flaw that allows hackers to hijack on-premises versions of ...